草地土壤有机质不同组分氮库对长期氮添加的响应
|
Responses of soil nitrogen in different soil organic matter fractions to long-term nitrogen addition in a semi-arid grassland
|
图4. 氮添加对土壤中颗粒态有机质(POM)和矿质结合态有机质(MAOM)的相对含量(A)、碳含量(B)和氮含量(C)的影响(平均值±标准误)。F和p为方差分析的结果, 不同字母表示不同氮添加水平间存在显著差异(p < 0.05)。 |
Fig. 4. Effect of nitrogen (N) addition on the relative mass (A), carbon (C) content (B) and N content (C) of particulate organic matter (POM) and mineral associated organic matter (MAOM)(mean ± SE). F and p are the results of one-way ANOVA. Different lowercase letters indicate significant difference (p < 0.05) among different N addition levels. |
![]() |